Duplicating phonograph-records.



PATEN'TED NOV. 27, 1906.V

V. M. HARRIS. Y DUVPLIGATING PHONOGRAPH RECORDS.

APPLICATION FILED APB..11.1904.

y Mm' MyW/@m SITES PATE rien.

VARIAN M. HARRIS, OF CHICAGO, ILLINOIS, ASSIGNOR OF ONE-FIFTH TO ROBERT BURNS, OF CHICAGO, ILLINOIS.

DUPLICATING PHONOGRAPHRECORDSQ Specification of Letters Patent.

Patented Nov. 27,1906.

Application led April 1]., 1904. Serial N0. 202,515.

To all whom it may concern.-

Beit known that I, VARrAN M. HARRIS, a citizen of the United States of America, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Duplicating Phonograph-Records, of which the following 1s a specification.

The present invention relates to that method or process of manufacturing duplicate phonograph-records of Celluloid or other like material in which a mold is used having a negative matrix formed in its interior surface 'or bore and into which negative-matrix surface the duplicate phonograph-record in the form of a thin=walled cylinder is pressed to impart to the periphery of such cylinder a positive impression from such negative-matrix surface; and the object of the present improvement is to provide a simple and efficient method for use in the manufacture of their cylindrical phono raph-records and with which the pro duction o the duplicate records can be effected in a rapid, certain, and positive manner, all as will hereinafter more fully appear and be more particularly pointed out in the claims.

In the accompanying drawings, illustrative of the present invention, Figure 1 is a longitudinal section on line a; 11:, Fig. 2, of an apparatus adapted to `carry out the present method; Fig. 2, a transverse section of the same atline Fig. l.

Similar numerals of reference indicate like parts in both views of the drawings.

Referring to the drawings, 1 represents the main mold body or backing of any usual suitable external form and of tlie required length and which is formed with a longitudinal centra-l bore, as shown; 2, a negative matrix, of metal or other like hard substance, having a cylindrical form and fitted or iixedly secured within the bore of the main mold body or backing 1, as a lining. Such negative matrix will have its interior surface formed into a negative matrix in any usual manner, either by the electrolytic or other methods now generally employed in the present art.

3 represents the thin cylindrical recordblank in place Within the mold and in readiness to be formed into a completed record by the present apparatus.

4 is a pressure-roller of a cylindrical form, having a uniform diameter along its entire length and which is arranged lon itudinally wit in the bore of the mold and b ank, with its axis of rotation eccentric to the axis of the cylindrical bore of the mold, &c., and with its periphery adapted to have forcible and rolling contact with the inner surface of the blank along the entire length thereof, so that in its movement of rotation upon its own axis andin its orbital movement around the axis of the other partsthe said ressureroller will embed the periphery of t e duplicate record-blank 3 in the negative-matrix surface of the negative matrix 2, so that with a completion of the movement of said ressure-roller and the removal of such b ank from the interior of the mold the periphery of such blank will have a positive impression of the negative matrix and be in a condition ready for use on a phonograph or like apparatus. Motion when required may be imparted to'the said pressure-rollerin a positive manner by any suitable carrying and driving mechanism which the judgment of the maker may suggest or the particular use of the present invention may indicate.

In the practical use of the present method any usual and suitable means, either physical or chemical, may be employed to soften the duplicate phonograph-blank 3 during the process of imparting a positive impression upon the same from the negative-matrix surface 2 and with a view to expedite the operation of the apparatus or when required in the formation of a more perfect positive impression upon the periphery of such duplicate record-blanks.

The present method is more especially adapted to the formation of duplicate records having very thin walls which render them readily collapsible, in that by partly collapsing the same they can' after forming be readily and quickly removed from the interior of the mold without any liability to a marring or dcfaccment of the positive record impressions upon their peripheries.

The apparatus herein described constitutes 'the subject-matter of a divisional application for Letters Patent filed by me April 20, 1906, Serial No. 312,763.

Having thus fully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-

l. The horcin-descril)ed method of forming thin-walled cylindrical phonograph-rec- IOO ords of a uniform diemeter which comprises the insertion of a cylindrical blank shell Within -a Asuitable matrix, and: the. expansion of such shell into such matrix along the entire length of such shell end'in the progressive manner described.

2. The hereinedesoribed-meqhod of forming thin-Walled cylindrical phonograph-reeords of a, uniform diameter which comprises the insertion of a cylindrical. blank shell Within e suitable matrix, and the expansion `of such lslaellinto such mtrix elongthe entire length of such shell and in the progress ive manner described, and` in the presenee of a local Softenin influence.

VARIAN M. HARRIS.

I5 ned at' Ghieago, Illinois, this 6th dey of Apri 1904. 

